1 files changed, 5 insertions, 1 deletions
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index d714281..c1e2c1a 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -923,7 +923,11 @@ extern void set_gdbarch_max_insn_length (struct gdbarch *gdbarch, ULONGEST max_i
   
    If your architecture doesn't need to adjust instructions before
    single-stepping them, consider using simple_displaced_step_copy_insn
-   here. */
+   here.
+
+   If the instruction cannot execute out of line, return NULL.  The
+   core falls back to stepping past the instruction in-line instead in
+   that case. */
 
 extern int gdbarch_displaced_step_copy_insn_p (struct gdbarch *gdbarch);